Thunder, sirens and how fast sound travels

The 15 questions of lesson 18 «Thunder, sirens and how fast sound travels» of the physics course of Mova's primary school with their options, 81 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: the lesson at school.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/questions/physics/18-thunder-sirens-and-how-fast-sound-travels/